Millhaus

Can anyone tell me what these three (injector looking) outlets are that come out of the exhaust ports and come together into one pipe? It looks like some kind of emissions.

How do it get rid of them and plug the holes? Is there something that can screw into the holes and delete these things?

Thanks

Mark Houghton

Emissions is correct. They are air lines coming from your air pump.
Read this: http://forums.pelicanparts.com/911-9...ght=air+delete

Millhaus

Thanks Mark that helps alot. The emission were removed from my car when I bought it 5 years ago but this part was still on. Where it Y's out to the pump mine is cut, crimped and welded together. I couldn't tell what it was for besides some sort of emissions.

Millhaus

Okay Can you tell me what this is? It is on the Front left at the top. It looks like an oil pump but it also looks like there is supposed to be a belt driving it or running off of it. I have have no belt driving it.

Just curious because it looks like it might have two purposes.

Last930

Thats the airpump that sends the air to the heads. This causes the unburned gas to continue to burn as it leaves the cumbustion chamber and exits into what was originally called a thermal reactor. This was a big heavy can that attached directly to the cylinder head. The reason they are commonly removed is that they get extremely hot; upon shutdown all the heat radiates up into the head causing premature valve guide and seal wear. It was not unusual for thermal reactor equipped cars to require a top-end overhaul at 30-40 K miles. Plus they are heavy and cause a lot of backpressure. Get a set of headers!!

Millhaus

So I can just remove this and get rid of it?

A930Rocket

No, what's left is the turbo sump drain pump. It's driven off the end of the camshaft.

That said, if you had access to a machine shop or someone who does, you could fab a spacer or drive to remove the air pump pulley portion. Too much work IMHO.

Mark Houghton

So there is no confusion, the picture is of the air pump drive pulley (not the air pump itself) and the turbo sump drain pump.

My car no longer has the air pump installed but still has the drive pulley as pictured. This winter it all goes away as I modify the drive to accomodate SC cams.

By the way, my car still has the air injectors and assorted plumbing in the heads as well. It was simply plugged upstream as yours has been. It all comes out this winter as well.

PorscheDoc

You can pull the lines (from the heads) and use the following plugs available from Porsche to plug them. 900.219.007.02 You will also want 6 sealing rings....IIRC it is something like a 10x14. Make sure to use high temp locktite when you install the plugs, or you can end up with an unexpected exhaust leak when they back out.

911rudy

You might want to spray a little engine cleaner on that mess. I'll bet that baby can sure put out a burnt oil smell in a closed garage when hot.

Millhaus

Thanks everyone, that clears things up. I am doing a complete rebuild myself. First one!

The engine was fairly clean before I started. Some oill left in the engine as I rotated it and some PB mixed in created quite a mess. It will be spotless when I'm finished.

Metal Guru

I think you could get some mileage out of Wayne Dempsey's book "How to Rebuild and Modify Porsche 911 Engines".

Millhaus

I have it. It helps but they are rebuilding a 2.7l and don't describe many things on the turbo engine. (Exhaust, FI, pressure plate, fly wheel,...)

It give me a great start and general direction but doesn't describe everything.